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<?php |
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declare(strict_types=1); |
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/** |
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* Saito - The Threaded Web Forum |
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* |
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* @copyright Copyright (c) the Saito Project Developers |
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* @link https://github.com/Schlaefer/Saito |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace App\Model\Behavior; |
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use App\Lib\Model\Table\FieldFilter; |
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use App\Model\Entity\Entry; |
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use App\Model\Table\EntriesTable; |
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use Cake\Cache\Cache; |
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use Cake\Datasource\Exception\RecordNotFoundException; |
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use Cake\ORM\Behavior; |
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use Cake\ORM\Query; |
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use Saito\Posting\Basic\BasicPostingInterface; |
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use Saito\Posting\Posting; |
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use Saito\Posting\TreeBuilder; |
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use Saito\User\CurrentUser\CurrentUserInterface; |
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use Stopwatch\Lib\Stopwatch; |
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use Traversable; |
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class PostingBehavior extends Behavior |
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{ |
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/** @var CurrentUserInterface */ |
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private $CurrentUser; |
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/** @var FieldFilter */ |
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private $fieldFilter; |
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/** |
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* {@inheritDoc} |
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*/ |
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public function initialize(array $config) |
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{ |
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$this->fieldFilter = (new fieldfilter()) |
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->setConfig('create', ['category_id', 'pid', 'subject', 'text']) |
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->setConfig('update', ['category_id', 'subject', 'text']); |
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} |
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/** |
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* Creates a new posting from user |
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* |
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* @param array $data raw posting data |
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* @param CurrentUserInterface $CurrentUser the current user |
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* @return Entry|null on success, null otherwise |
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*/ |
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public function createPosting(array $data, CurrentUserInterface $CurrentUser): ?Entry |
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{ |
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$data = $this->fieldFilter->filterFields($data, 'create'); |
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if (!empty($data['pid'])) { |
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/// new posting is answer to existing posting |
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$parent = $this->getTable()->get($data['pid']); |
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if (empty($parent)) { |
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throw new \InvalidArgumentException( |
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'Parent posting for creating a new answer not found.', |
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1564756571 |
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); |
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} |
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$data = $this->prepareChildPosting($parent, $data); |
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} else { |
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/// if no pid is provided the new posting is root-posting |
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$data['pid'] = 0; |
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} |
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/// set user who created the posting |
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$data['user_id'] = $CurrentUser->getId(); |
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$data['name'] = $CurrentUser->get('username'); |
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$this->validatorSetup($CurrentUser); |
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/** @var EntriesTable */ |
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$table = $this->getTable(); |
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return $table->createEntry($data); |
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} |
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/** |
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* Updates an existing posting |
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* |
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* @param Entry $posting the posting to update |
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* @param array $data data the posting should be updated with |
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* @param CurrentUserInterface $CurrentUser the current-user |
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* @return Entry|null the posting which was asked to update |
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*/ |
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public function updatePosting(Entry $posting, array $data, CurrentUserInterface $CurrentUser): ?Entry |
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{ |
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$data = $this->fieldFilter->filterFields($data, 'update'); |
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$isRoot = $posting->isRoot(); |
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if (!$isRoot) { |
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$parent = $this->getTable()->get($posting->get('pid')); |
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$data = $this->prepareChildPosting($parent, $data); |
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} |
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$data['edited_by'] = $CurrentUser->get('username'); |
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/// must be set for validation |
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$data['locked'] = $posting->get('locked'); |
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$data['fixed'] = $posting->get('fixed'); |
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$data['category_id'] = $data['category_id'] ?? $posting->get('category_id'); |
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$data['pid'] = $posting->get('pid'); |
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$data['time'] = $posting->get('time'); |
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$data['user_id'] = $posting->get('user_id'); |
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$this->validatorSetup($CurrentUser); |
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$this->getTable()->getValidator()->add( |
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'edited_by', |
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'isEditingAllowed', |
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['rule' => [$this, 'validateEditingAllowed']] |
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); |
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/** @var EntriesTable */ |
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$table = $this->getTable(); |
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return $table->updateEntry($posting, $data); |
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} |
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/** |
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* Populates data of an answer derived from parent the parent-posting |
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* |
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* @param BasicPostingInterface $parent parent data |
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* @param array $data current posting data |
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* @return array populated $data |
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*/ |
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public function prepareChildPosting(BasicPostingInterface $parent, array $data): array |
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{ |
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if (empty($data['subject'])) { |
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// if new subject is empty use the parent's subject |
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$data['subject'] = $parent->get('subject'); |
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} |
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$data['category_id'] = $data['category_id'] ?? $parent->get('category_id'); |
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$data['tid'] = $parent->get('tid'); |
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return $data; |
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} |
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/** |
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* Sets-up validator for the table |
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* |
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* @param CurrentUserInterface $CurrentUser current user |
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* @return void |
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*/ |
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private function validatorSetup(CurrentUserInterface $CurrentUser): void |
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{ |
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$this->CurrentUser = $CurrentUser; |
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$this->getTable()->getValidator()->add( |
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'category_id', |
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'isAllowed', |
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['rule' => [$this, 'validateCategoryIsAllowed']] |
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); |
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} |
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/** |
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* check that entries are only in existing and allowed categories |
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* |
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* @param mixed $categoryId value |
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* @param array $context context |
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* @return bool |
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*/ |
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public function validateCategoryIsAllowed($categoryId, $context): bool |
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{ |
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$isRoot = $context['data']['pid'] == 0; |
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$action = $isRoot ? 'thread' : 'answer'; |
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// @td better return !$posting->isAnsweringForbidden(); |
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return $this->CurrentUser->getCategories()->permission($action, $categoryId); |
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} |
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/** |
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* check editing allowed |
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* |
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* @param mixed $check value |
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* @param array $context context |
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* @return bool |
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*/ |
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public function validateEditingAllowed($check, $context): bool |
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{ |
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$posting = (new Posting($context['data']))->withCurrentUser($this->CurrentUser); |
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return $posting->isEditingAllowed(); |
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} |
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/** |
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* Get an array of postings for threads |
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* |
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* @param array $tids Thread-IDs |
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* @param array|null $order Thread sort order |
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* @param CurrentUserInterface $CU Current User |
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* @return array Array of postings found |
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* @throws RecordNotFoundException If no thread is found |
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*/ |
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public function postingsForThreads(array $tids, ?array $order = null, CurrentUserInterface $CU = null): array |
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{ |
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$entries = $this->getTable() |
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->find('entriesForThreads', ['threadOrder' => $order, 'tids' => $tids]) |
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->all(); |
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if (!count($entries)) { |
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throw new RecordNotFoundException( |
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sprintf('No postings for thread-IDs "%s".', implode(', ', $tids)) |
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); |
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} |
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return $this->entriesToPostings($entries, $CU); |
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} |
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/** |
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* Get a posting for a thread |
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* |
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* @param int $tid Thread-ID |
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* @param bool $complete complete fieldset |
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* @param CurrentUserInterface|null $CurrentUser CurrentUser |
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* @return Posting |
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* @throws RecordNotFoundException If thread isn't found |
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*/ |
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public function postingsForThread(int $tid, bool $complete = false, ?CurrentUserInterface $CurrentUser = null): Posting |
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{ |
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$entries = $this->getTable() |
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->find('entriesForThreads', ['complete' => $complete, 'tids' => [$tid]]) |
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->all(); |
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if (!count($entries)) { |
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throw new RecordNotFoundException( |
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sprintf('No postings for thread-ID "%s".', $tid) |
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); |
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} |
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$postings = $this->entriesToPostings($entries, $CurrentUser); |
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return reset($postings); |
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} |
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/** |
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* Delete a node |
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* |
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* @param int $id the node id |
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* @return bool |
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*/ |
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public function deletePosting(int $id): bool |
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{ |
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$root = $this->postingsForNode($id); |
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if (empty($root)) { |
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throw new \InvalidArgumentException(); |
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} |
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$nodesToDelete[] = $root; |
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$nodesToDelete = array_merge($nodesToDelete, $root->getAllChildren()); |
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$idsToDelete = []; |
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foreach ($nodesToDelete as $node) { |
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$idsToDelete[] = $node->get('id'); |
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}; |
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/** @var EntriesTable */ |
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$table = $this->getTable(); |
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return $table->deleteWithIds($idsToDelete); |
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} |
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/** |
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* Get recent postings |
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* |
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* ### Options: |
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* |
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* - `user_id` int|<null> If provided finds only postings of that user. |
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* - `limit` int <10> Number of postings to find. |
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* |
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* @param CurrentUserInterface $User User who has access to postings |
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* @param array $options find options |
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* |
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* @return array Array of Postings |
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*/ |
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public function getRecentPostings(CurrentUserInterface $User, array $options = []): array |
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{ |
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Stopwatch::start('PostingBehavior::getRecentPostings'); |
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$options += [ |
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'user_id' => null, |
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'limit' => 10, |
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]; |
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$options['category_id'] = $User->getCategories()->getAll('read'); |
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$read = function () use ($options) { |
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$conditions = []; |
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if ($options['user_id'] !== null) { |
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$conditions[]['Entries.user_id'] = $options['user_id']; |
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} |
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if ($options['category_id'] !== null) { |
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$conditions[]['Entries.category_id IN'] = $options['category_id']; |
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}; |
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$result = $this |
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->getTable() |
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->find( |
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'entry', |
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[ |
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'conditions' => $conditions, |
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'limit' => $options['limit'], |
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'order' => ['time' => 'DESC'] |
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] |
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) |
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// hydrating kills performance |
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->enableHydration(false) |
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->all(); |
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return $result; |
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}; |
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$key = 'Entry.recentEntries-' . md5(serialize($options)); |
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$results = Cache::remember($key, $read, 'entries'); |
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$threads = []; |
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foreach ($results as $result) { |
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$threads[$result['id']] = (new Posting($result))->withCurrentUser($User); |
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} |
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Stopwatch::stop('PostingBehavior::getRecentPostings'); |
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return $threads; |
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} |
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/** |
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* Convert array with Entry entities to array with Postings |
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* |
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* @param Traversable $entries Entry array |
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* @param CurrentUserInterface|null $CurrentUser The current user |
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* @return array |
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*/ |
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protected function entriesToPostings(Traversable $entries, ?CurrentUserInterface $CurrentUser = null): array |
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{ |
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Stopwatch::start('PostingBehavior::entriesToPostings'); |
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$threads = []; |
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$postings = (new TreeBuilder())->build($entries); |
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foreach ($postings as $thread) { |
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$posting = new Posting($thread); |
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if ($CurrentUser) { |
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$posting->withCurrentUser($CurrentUser); |
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} |
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$threads[$thread['tid']] = $posting; |
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} |
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Stopwatch::stop('PostingBehavior::entriesToPostings'); |
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return $threads; |
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} |
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/** |
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* tree of a single node and its subentries |
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* |
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* @param int $id id |
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* @return Posting|null tree or null if nothing found |
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*/ |
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protected function postingsForNode(int $id) : ?Posting |
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{ |
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/** @var EntriesTable */ |
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$table = $this->getTable(); |
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$tid = $table->getThreadId($id); |
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$postings = $this->postingsForThreads([$tid]); |
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$postings = array_shift($postings); |
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return $postings->getThread()->get($id); |
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} |
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/** |
378
|
|
|
* Finder to get all entries for threads |
379
|
|
|
* |
380
|
|
|
* @param Query $query Query |
381
|
|
|
* @param array $options Options |
382
|
|
|
* - 'tids' array required thread-IDs |
383
|
|
|
* - 'complete' fieldset |
384
|
|
|
* - 'threadOrder' order |
385
|
|
|
* @return Query |
386
|
|
|
*/ |
387
|
|
|
public function findEntriesForThreads(Query $query, array $options): Query |
388
|
|
|
{ |
389
|
|
|
Stopwatch::start('PostingBehavior::findEntriesForThreads'); |
390
|
|
|
$options += [ |
391
|
|
|
'complete' => false, |
392
|
|
|
'threadOrder' => ['last_answer' => 'ASC'], |
393
|
|
|
]; |
394
|
|
|
if (empty($options['tids'])) { |
395
|
|
|
throw new \InvalidArgumentException('Not threads to find.'); |
396
|
|
|
} |
397
|
|
|
$tids = $options['tids']; |
398
|
|
|
$order = $options['threadOrder']; |
399
|
|
|
unset($options['threadOrder'], $options['tids']); |
400
|
|
|
|
401
|
|
|
$query = $query->find('entry', $options) |
402
|
|
|
->where(['tid IN' => $tids]) |
403
|
|
|
->order($order) |
404
|
|
|
// hydrating kills performance |
405
|
|
|
->enableHydration(false); |
406
|
|
|
Stopwatch::stop('PostingBehavior::findEntriesForThreads'); |
407
|
|
|
|
408
|
|
|
return $query; |
409
|
|
|
} |
410
|
|
|
} |
411
|
|
|
|
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArray
is initialized the first time when the foreach loop is entered. You can also see that the value of thebar
key is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.